Milk is a valuable food that is consumed daily and provides nutrition for all age groups. It is processed and handled in dairy plants that can process up to 5 million liters per day. Milk contains varying amounts of fat depending on whether it is whole, semi-skimmed, or skimmed milk. Dairies process, store, and distribute milk and milk products. Milk production systems include extensive, intensive, agro-livestock, and commercial farming. Milk provides important nutrients like calcium and vitamin D for bone health.